Extras

Maul, Piston

An alchemically-fired piston in the head of this
two-handed hammer strikes targets with astounding force.

Benefit: Successful sunder attacks made with a piston maul deal an additional +4 points of damage. A piston maul requires a thunderstone to function; otherwise you treat it as a greatclub. Inserting a thunderstone into the weapon’s compartment is a standard action, and powers the weapon for 24 hours, after which the thunderstone is consumed.